EP1642143A1 - Method and circuit arrangement for the self-testing of a reference voltage in electronic components - Google Patents

Method and circuit arrangement for the self-testing of a reference voltage in electronic components

Info

Publication number
EP1642143A1
EP1642143A1 EP04736785A EP04736785A EP1642143A1 EP 1642143 A1 EP1642143 A1 EP 1642143A1 EP 04736785 A EP04736785 A EP 04736785A EP 04736785 A EP04736785 A EP 04736785A EP 1642143 A1 EP1642143 A1 EP 1642143A1
Authority
EP
European Patent Office
Prior art keywords
sub
ref
reference voltage
function
test
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04736785A
Other languages
German (de)
French (fr)
Other versions
EP1642143B1 (en
Inventor
Martin Philips I. P. & Standards GmbH Kadner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NXP BV
Original Assignee
Philips Intellectual Property and Standards GmbH
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Intellectual Property and Standards GmbH, Koninklijke Philips Electronics NV filed Critical Philips Intellectual Property and Standards GmbH
Publication of EP1642143A1 publication Critical patent/EP1642143A1/en
Application granted granted Critical
Publication of EP1642143B1 publication Critical patent/EP1642143B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/30—Marginal testing, e.g. by varying supply voltage
    • G01R31/3004—Current or voltage test
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/3167—Testing of combined analog and digital circuits

Definitions

  • BIST Built-in Self-Test
  • the two values differ from the value of the function for the reference voltage U ref in the same direction, in the positive direction in the present example, this means that the value for the reference voltage U ref is at the extreme of the function f(x) employed in the block test and the reference voltage is thus at its nominal value U re f.t est -
  • the result of the test on the reference voltage U ref is then passed on via an AND circuit as a pass signal. Otherwise a fail signal is emitted.
  • the comparator circuits may be of any desired form and have a pass or fail signal as an output.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Control Of Electrical Variables (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

To provide a method for the self-testing of a reference voltage in electronic components, by means of which method there is defined a circuit arrangement for a self-test of the reference voltage that can be implemented in the form of an on-chip test, i.e. for which no external reference-voltage source is required, provision is made for the reference voltage <SUB>(Uref) </SUB>to be the variable of a function f(U<SUB>ref</SUB>) that has an extreme at the point where the selected nominal value (U<SUB>ref.test</SUB>) of the reference voltage (U<SUB>ref</SUB>)is situated and, in a self-test, for the values of the function to be determined in succession for the reference voltage (Uref) and for two further test voltages (U<SUB>ref</SUB>+DeltaU<SUB>ref</SUB>; U<SUB>ref</SUB>-DeltaU<SUB>ref</SUB>) that differ from the reference voltage (U<SUB>ref</SUB>) by only small positive and negative amounts (+DeltaU<SUB>ref</SUB>; -DeltaU<SUB>ref</SUB>)respectively and for these values to be compared with one another and, if the values of the function for the test voltages (U<SUB>ref</SUB>+DeltaU<SUB>ref</SUB>; U<SUB>ref</SUB>-DeltaU<SUB>ref</SUB>) differ from the value of the function for the reference voltage (U<SUB>ref</SUB>) in the same direction, for a pass signal to be generated, or if not, for a fail signal to be generated.

Description

Method and circuit arrangement for the self-testing of a reference voltage in electronic components
The invention relates to a method and a circuit arrangement for the self-testing of a reference voltage in electronic components.
During the production process, but also when operating in the field, integrated circuits need to be tested to ensure they are operating correctly. Because there are many disadvantages to using external testing devices, given that contact has to be made with each chip individually and subsequent testing of the chip under operating conditions is no longer possible, testing circuits built into the chip itself have become an established practice. This method of testing is known by the name BIST (Built-in Self-Test). BIST gives a chip a closed-loop procedure for identifying faults. The circuits are often fitted with internally regulated voltage sources that are used as sources of reference voltages for comparison with voltages or currents within the integrated circuitry belonging to the circuits. These reference-voltage sources are intended to be as insensitive as possible to the effects of temperature and to external power-supply means from which the voltages fluctuate. To enable a test to be made to check that these conditions are being met, it is known for the reference voltage from a source of this kind to be compared with an external reference voltage. This has the disadvantage that has already been described above for BIST, namely that when the chip is operating in the field contact has to be made with it from outside, which involves an unusual amount of circuitry and cost.
It is an object of the invention to specify a circuit arrangement for the self- testing of the reference voltage that can be implemented as an on-chip test, i.e. for which no external reference- voltage source is required.
In accordance with the invention, this object is achieved by virtue of the features of claims 1 and 2.
Under these, the reference voltage is the variable of a function that has an extreme at the point where the selected nominal value of the selected reference voltage is situated. In a self-test, the values of the function are determined in succession for the reference voltage and for two further test voltages that differ from the reference voltage by only small positive and negative amounts respectively and these values of the function are compared with one another. If the values of the function for the test voltages differ from the value of the function for the reference voltage in the same direction a pass signal is generated, or if not a, fail signal. An associated circuit arrangement comprises a function generator having a function that has an extreme at the point where the selected nominal value of the reference voltage is situated. The input signals to the function generator are the reference voltage and two further test voltages that differ from the reference voltage by only small negative and positive amounts respectively. The output signals from the function generator are fed to sample & hold circuits whose contents are compared in two comparison circuits for comparing the value of the function for the reference voltage with respective ones of the test voltages.
These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter.
In the drawings:
The single Figure is a block circuit diagram of a corresponding testing arrangement.
What is taken as a basis is a mathematical function that meets the requirement ^=0 where X=UrefMst
where Uref.test = nominal reference voltage. What this means is that the function f, which depends on the reference voltage
Uref to be tested, has an extreme at the point where the nominal voltage Uref.test is situated. If, in what follows, two further test voltages are selected that differ from the reference voltage Uref by only a small amount ΔUref, then the values of the function that can be expected for them are either smaller than the value for the voltage Uref for testing when there is a maximum at the point at which the nominal voltage Uref.test is situated, or are larger than it when there is a minimum at the said point.
The function f = (Uref)3 - Uref.test or example has a clear minimum value at the point Uref.test- The Figure is a block circuit diagram of a reference- voltage test that operates on the basis according to the invention. In this case, three values are applied in succession to one and the same block (test) that represents the function described above. The output values are stored in respective sample & hold circuits. Once all the values of the function have been determined, the relationships between the results given by the reference voltage Uref and by the minimal shifts by the voltage ΔUref are analyzed, i.e. they are compared with one another in comparators V. If the two values differ from the value of the function for the reference voltage Uref in the same direction, in the positive direction in the present example, this means that the value for the reference voltage Uref is at the extreme of the function f(x) employed in the block test and the reference voltage is thus at its nominal value Uref.test- The result of the test on the reference voltage Uref is then passed on via an AND circuit as a pass signal. Otherwise a fail signal is emitted. This happens if a comparison of the value of the function for the test voltage Uref + ΔUref or Uref- ΔUref shows it to be larger than the value of the function for the reference voltage Uref and the other value then to be smaller than that for the reference voltage Uref. The comparator circuits may be of any desired form and have a pass or fail signal as an output.
Because of the manufacturing tolerance in the production process, a once-only calibration of the f(x) function in the block test is necessary for each chip.
LIST OF REFRENCE NUMERALS:
V Comparator
Ure Reference voltage
ΔUref Value of difference from reference voltage
S&H Sample & hold circuit pass Pass signal fail Fail signal

Claims

CLA S:
1. A method for the self-testing of a reference voltage in electronic components, characterized in that the reference voltage (Uref) is the variable of a function f(Uref) that has an extreme at the point where the selected nominal value (Uref.test) of the reference voltage (Uref) is situated and in a self-test, the values of the function are determined in succession for the reference voltage (Uref) and for two further test voltages (Uref + ΔUref; Uref - ΔUref) that differ from the reference voltage (Uref) by only small positive and negative amounts (+ΔUref;- ΔUref) respectively and these values are compared with one another, and if the values of the function for the test voltages (Uref + ΔUref; Uref - ΔUref) differ from the value of the function for the reference voltage (Uref) in the same direction a pass signal is generated, or if not, a fail signal is generated.
2. A circuit arrangement for the self-testing of a reference voltage (Uref) in electronic components, characterized in that it comprises a function generator having a function f(Uref) that has an extreme at the point where the selected nominal value (Uref.test) of the reference voltage (Uref) is situated, and the mput signals to which function generator are the reference voltage (Uref) and two further test voltages (Uref + ΔUref; Uref - ΔUref) that differ from the reference voltage (Uref) by only small positive and negative amounts respectively, and the output signals from which function generator are fed to sample & hold circuits, and in that it comprises two comparator circuits for comparing the values of the function for the reference voltage (Uref) and for respective test voltages (Uref + ΔUref; Uref - ΔUref), the outputs of which comparator circuits generate a pass signal if the signs of the signals at them are the same, and a fail signal if they are not.
EP04736785A 2003-06-25 2004-06-14 Method and circuit arrangement for the self-testing of a reference voltage in electronic components Expired - Lifetime EP1642143B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP03101869 2003-06-25
PCT/IB2004/050897 WO2004113938A1 (en) 2003-06-25 2004-06-14 Method and circuit arrangement for the self-testing of a reference voltage in electronic components

Publications (2)

Publication Number Publication Date
EP1642143A1 true EP1642143A1 (en) 2006-04-05
EP1642143B1 EP1642143B1 (en) 2008-02-20

Family

ID=33522399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04736785A Expired - Lifetime EP1642143B1 (en) 2003-06-25 2004-06-14 Method and circuit arrangement for the self-testing of a reference voltage in electronic components

Country Status (7)

Country Link
US (1) US7183773B2 (en)
EP (1) EP1642143B1 (en)
JP (1) JP2007516414A (en)
CN (1) CN100430738C (en)
AT (1) ATE386945T1 (en)
DE (1) DE602004011938T2 (en)
WO (1) WO2004113938A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435818A (en) * 2011-11-24 2012-05-02 福州大学 Test method of high-precision dynamic comparator and test circuit thereof
CN103837766B (en) * 2013-10-30 2019-06-11 惠阳东美音响制品有限公司 A kind of method for automatically searching for the contact connecting electronic building brick

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH565468A5 (en) * 1973-01-31 1975-08-15 Bbc Brown Boveri & Cie
DE4439707A1 (en) * 1994-11-05 1996-05-09 Bosch Gmbh Robert Voltage reference with testing and self-calibration
US20030018937A1 (en) * 2001-07-18 2003-01-23 Athavale Atul S. Method and apparatus for efficient self-test of voltage and current level testing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004113938A1 *

Also Published As

Publication number Publication date
CN100430738C (en) 2008-11-05
EP1642143B1 (en) 2008-02-20
ATE386945T1 (en) 2008-03-15
WO2004113938A1 (en) 2004-12-29
US7183773B2 (en) 2007-02-27
JP2007516414A (en) 2007-06-21
CN1813196A (en) 2006-08-02
US20060181282A1 (en) 2006-08-17
DE602004011938D1 (en) 2008-04-03
DE602004011938T2 (en) 2009-02-26

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